Final answer:
Marco will have $205 when Ava has $210. They both earn $17 per hour, and it takes Ava 10 hours to reach $210 from her initial $40, which results in Marco earning $170 in addition to his initial $35.
Step-by-step explanation:
The question is asking how much money Marco will have when Ava has accumulated $210 while both are earning $17 per hour. To start with, Marco had $35 and Ava had $40. Since Ava needs to reach $210, we need to calculate how many hours it will take for her to earn the additional amount. Ava needs to earn $210 - $40 = $170. At the rate of $17 per hour, it will take her $170 / $17 = 10 hours to reach $210.
Now, we know both Marco and Ava are earning the same amount per hour, so after 10 hours, Marco will also have earned 10 hours * $17/hour = $170. Since Marco started with $35, after 10 hours, he will have $35 + $170 = $205.